logic: rewrote messages handling token activation for correct restoring on undo

* saving search query to undo stack with MessageSearch
* saving node and edge with name to undo stack with MessageActivateNode and MessageActivateEdge
* added FeatureController that handels distribution of MessageActivateTokens
* clearing views when refreshing or changing project
* clearing undo stack when changing project
* added StorageCache derived from StorageAccessProxy

src/lib/component/controller/FeatureController.cpp

@@ -0,0 +1,79 @@
+#include "component/controller/FeatureController.h"
+
+#include "utility/messaging/type/MessageActivateTokens.h"
+
+#include "data/access/StorageAccess.h"
+
+FeatureController::FeatureController(StorageAccess* storageAccess)
+	: m_storageAccess(storageAccess)
+{
+}
+
+FeatureController::~FeatureController()
+{
+}
+
+void FeatureController::handleMessage(MessageActivateEdge* message)
+{
+	Id edgeId = message->tokenId;
+
+	if (!message->isFresh())
+	{
+		edgeId = m_storageAccess->getIdForEdgeWithName(message->name);
+	}
+
+	if (!edgeId)
+	{
+		return;
+	}
+
+	if (message->type == Edge::EDGE_AGGREGATION)
+	{
+		MessageActivateTokens(m_storageAccess->getTokenIdsForAggregationEdge(edgeId)).dispatch();
+		return;
+	}
+
+	MessageActivateTokens msg(std::vector<Id>(1, edgeId));
+	msg.isEdge = true;
+	msg.dispatch();
+}
+
+void FeatureController::handleMessage(MessageActivateFile* message)
+{
+	MessageActivateTokens(std::vector<Id>(1, m_storageAccess->getTokenIdForFileNode(message->filePath))).dispatch();
+}
+
+void FeatureController::handleMessage(MessageActivateNode* message)
+{
+	Id nodeId = message->tokenId;
+
+	if (!message->isFresh())
+	{
+		nodeId = m_storageAccess->getIdForNodeWithName(message->name);
+	}
+
+	if (nodeId)
+	{
+		MessageActivateTokens msg(nodeId);
+		msg.isFromSystem = message->isFromSystem;
+		msg.dispatch();
+	}
+}
+
+void FeatureController::handleMessage(MessageActivateTokenLocation* message)
+{
+	if (message->locationId)
+	{
+		Id nodeId = m_storageAccess->getActiveNodeIdForLocationId(message->locationId);
+		MessageActivateNode(
+			nodeId,
+			m_storageAccess->getNodeTypeForNodeWithId(nodeId),
+			m_storageAccess->getNameForNodeWithId(nodeId)
+		).dispatch();
+	}
+}
+
+void FeatureController::handleMessage(MessageSearch* message)
+{
+	MessageActivateTokens(m_storageAccess->getTokenIdsForQuery(message->getQuery())).dispatch();
+}